Reenforced-concrete post



Feb. 9 1926.

1,572,669 K. MULLER REENF'ORCED CONCRETE POST Filed August 13, 1924 l va a 9 /5 Z IIIII J v I 4g;

I v g VENTORT '7 BY Kay/. AiLLLer Patented Feb. 5%,

n stares untriarass KARL MTLTLLEB, OF DETROIT, MICHIGAN.

BEENEOECED-CONCRETE POST.

Application f led August 13, 1924. Serial No. 731,705.

To all LU/72.0712, it may] c'o-nc'cmt.

Be it known that I, KARL MI'iLLnR, a former citizen of the Republic of Germany, and who have declared my intention of becoming a citizen of the UnitedSta'tes, residing at Detroit, in the county of l Vayne and State of Michigan, have invented a new and useful Improvement in a Beenforced- Concrete Post, of which the following is a specification. I

invention relates to a new. and useful improvement in a post and particularly posts used for supporting telephone wires, telegraph wires, and trolley wires, and the like, in wl 'ch a post of great strength is required together with considerable length.

The present invention provides a post ofthis class, made from concrete, and so reeniorced as to attord a post of this nature, which will be simple in structure, economical of manufacture, and highly ettlcient inuse.

An object of the invention is to provide a post of this class so constructed and reentore-ed as to present at those parts of the post which are subjected to heavy strain, particularly side strain, a maximum amount of strength. p U

Another object of the invention is the provision of. a post having a contour in cross section, which presents to the host the maximum amount of strength, at the same time reducing the amount of material used in. construction to a minimum.

Another object of the invention is the provision of a concrete post of this class having anchoring means at one end, adapted for imbeuding in the ground, or other material upon which mounted, so as to securely anchor the post in position for use.

smother object. of the invention is the mgement in the post of reentorcing meniso coi rdi1nitely positioned as to re duee the amount oili reenlorcem-ent to a minimum, and without sacrificing the strain resisting atalities desired in the post,

Another object of the invention is the urovision in a post of this class oil? binding members for securing the reeniorcing incur hers in assen'iblerl relation, which will be simple and tend to retain the reeni orcing members in the proper position, while, at the same time, the binding members positioned about the reentorcing members will be quickly and-easily assembled.

Other objects will appear hereinafter.

The inventioncensists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood from areference to the accompanying drawings, which form a part of this specification and in which,

Fig. 1 is a side elevational view of a post with parts broken away,

Fig. 2 is a transverse sectional view taken on substantially line 2 -2 of Fig. 1,

Fig. 3 is a transverse sectional view taken on substantially line 38 of Fig. 1,

Fig. 4; is a transverse sectional view talren on substantially line 4l l of Fig. 1,

Fig. 5 is a sectional view of a modified form of the invention, taken on substantially line 2-2 of Fig. 1, v

Fig. 6 is a sectional view of a modified form 0t the invei'ition, taken onsubstantially I line 3 3, as shown in Fig. 1,

Fig. 7 is a sectional view of a modified form of the invention, taken on substantially line l4, as shown in Fig. 1, i

Fig. 8 is a sectional view showing the means of attaching cross arm to the post when used for that purpose,

Fig. 9 is a fragmentary side elcvational view illustrating the anchoring means used in the invention,

Fig. 10 is another side elevational view of the anchoring means shown in Fig. 9.

The post shown in the drawings is formerv preferably from concrete, or other plastic material which may be moulded in forms. In the preferred t0rm,,the post is formed double T shaped in cross section, as shown in Fig. 2, having two portions which may be termed heads 14 and 15, connector l by a iortion which ma 7 be termed a neck 16 the inwardly faced. side walls 1?, 1'? and 191 being inclined outwardly from the outer face of the heads, as shown in Fig. 2, so that a proper form is provided into which the plastic material may be formed. Mountet in the forms and extending longitudiiially oi the post are reentorcing metallic rods 20, which are positioned at the outside corners of the heads 14 and 15. Mounted so as to extend longitudinally of the post in alinement with the rods 20, so as to determine a line parallel to the neck 16, are reeniorcing rods 21, 21, 22 and 22. Imbedded in the pcst, so as to lie in the line transversely to the neck 16 determined by the reentorcing rods 20 are reentorcing rods 23 and 23'. As shown in Fig. 8, the reenforcing rods 22, 22

and 21 and 21' do not appear, these reent'orcing rods extending approximately one half of the length of the post from the bottom upwardly. It is thus seen that the lower portion of the post is more heavily reenforced than that portion above it. The purpose of reenforcing' the posts in this way is to assure the greatest strength at that portion of the post which is subjected to the greatest strain. This is particularlyiniportant where the post is subjected to a side strain resulting from the elements, or an unusual pull sideway, because of the load which is mounted on the post. As shown in Fig. 4, only the reentorcing rods extend to the upper portion of the post. This serves to lighten the reen'lorcing material. at the upper portion of the post, which is subjected to less strain than the lower portion of the post, thus reducing the reenforceinent in the post, as the distance from the ground is increased. the reduction. of the reeniorce nient being proportionate to the reduction in strain to which the post is under normal conditions subjected. As shown in Fig. 1-, the formation of the post, at its upper end in cross section, does not show the recess shown in Figs. 2 and 3, the side walls being continuous throughout.

Although the post may be made of various sizes and various lengths for the purposes of illustration. when the postis used forcarrying telephone or telegraph wires, the length of it would be approximately 9.9 meters.

The heavy reenforceinent would extend approximately 4.8 meters from the lower end of the post. In other words, the r-seniorcing rods 22. 22-, 21 and 21. extend, when the post is the length mentioned, approximately 48 meters from the lower end. The reenforeing rods 23 and 23 would extend approximately 8 .3 meters, the reenforcing rods 20 extending throughout the entire length of the post. The cross section of the post would he changed at the place where the reenl oreing rods 23 and 23 terminate at their upward end, so that, from the point of ter urinating, the reenforeing rods 20 and 23' upwardly, the contour of the post would be as shown in Fig. at. If desired, the reen- "forcing rods 20 may be terminated slightly below the upper end of the post, so that the post would then have a contour and forma tion, as shown in Fig.8. As shown in Fig. 2, the reenlorcing rods are held in co-operative relation by means of binding wires bent around the reenforcing rods. At the position shown in Fig. 2, four separate pieces of wire are used, the wire 2-1; being: bent around the reenit'oreing rods 20, 21 and 23' and hav the angularly extending portion at one end and the angularly extending portion 25 the opposite end. The wire 26 is similarly bent around the reen'torcing rods 20, 22 and 23 atone end and provided,

with the angularly extending portion 26'. At the opposite end, the wire is bent around the recnt'orcing members 20, 22 ant 23 a1 C provided with the angularly extending portion 267. The wire 27 is at one end bent around the reenforcing rods 22, 20 and 28 and provided with the angularly extending end 27. The opposite end is angularly turned and bent around the reenforcing rods 21, 23 and 20 and provided with the angru larly extending end 27". The wire 28 is bent at one end around the reenforeing rods :22, 20 and 23, and provided with the angularly extending end 28. The opposite end is bent around the reent'orcing rods 20, 21 and 2 3 and provided with the angularly extending end 28". It thus seen that the reenforcing rods are bound firmly to each other and retained in their relative position. A feature of this arrangementof the bind ing wires is thatthe wires are all of uniform size and shape and easily assembled upon the reenforcing rods to retain the same in operative position. i

The reenforcing rodsshown in Fig. 3 are held together by binding wires, the wire 29 being bent around the reenforcilig rod 23 in engagement with the rod 23 and around the rod 20, so as to provide the angularly extending end 29. The wire 30 is bent around the reenforcing rod 23 extending in engagement with the rod 23 and curled around the rod 20 at its opposite ends, to provide the angularly extending portions 30 at each end. The rods 20, as shown in Fig. e, are bound together by means of a wire 31, which is bent at its ends around one of the reenforcing rods, to provide the inwardly projecting angularly turned ends 31.

In the modified form, the post, throughout the major portion of its length, is formed of such contour as to be. provided with an enlarged head 14 connected by an elongated neck forming portion 16 to a smaller head 15, the faces 17' and 18 of the heads being inclined inwardly toward the neck and away from the outer face of the heads. The contour of the post changes slightly proceeding from the base to the top, inasmuch as the post is designed to be made tapered toward the top. Imbedded in the lower portion or" the post, are reenforcing rods positioned in the smaller head 15 in groups oi fours, two of such groups being present, as shown in Fig. 5. The inner set of these reenforcing rods projects along the post to substantially that line which is indicated by the section line 33 on Fig. 1, the section shown in Fig. 6 being taken just above the ternii nation of these reenforcing rods, the inner set of these groups being shown in dotted lines in Fig. 6. The distance of extension of the inner set of these groups of reenforeingrods, which are shown in dotted lines in Fig.- 6, is substantially 4.8 meters when the post is formed 9.9 meters in length. As shown in Fig. 5, a single wire is provided for retaining the reenforcing rods in position, this wire being looped around the separate groups of fours intermediate its ends, the ends of the wire being angularly turned around the reenforcing rods projected through the head 14. The rods shown in the head 14 extend throughout the len th of the post termii'iating a short distance below its top. wires are used for tying the reenforcing rods together, one end being bent around the end reenforcing rod in the head 14 and the other end being bent around one of the outside reenforcing rods, as shown in Fig. 6. The contour of this modified form of post is also changed at a certain height to a square form as shown in Fig. 7. It will be noted that the central reenforcing rods which appear in the head 15 in Fig. 6 do not appear in Fig. 7, these reenforcing rods being terminated below the point at which the section shown in, Fig. 7 was taken. The length of the inner set of reenforcing rods, which do not appear in Fig. 7, is substam tially 8.3 meters in length. In the formation shown in Fig. 7, a single tie wire is used for binding the reenforcing rods together, the opposite end of this tie rod being curled around the same reenforcing rod. The purpose of terminating the reenforcing rods is as above stated to provide the greatest reenforcement in the post at those points which are subjected to the greatest strain, and to reduce the reenforcement as the points in the post are reached which are subjected to less strain.

In Fig. 8, I have shown a section of the post taken above the termination of all of the reenforcing rods, should it be desired to terminate the remaining rods slightly below the top, the post in this instance being sub stantially square and embraced by a U shaped clip 33, which is bolted by suitable bolts 3a to an angle iron 35, which serves as a cross arm for carrying wires which are attached to insulators 56. It is apparent that any necessary itbiitIC-lllilQlll} may be made to the post, in order to provide the propor carrying means for the purposes for which the post is intended. In Fig. 9, I have shown the post provided with an enlarged base adapted for anchoring the post in the ground more securely, the base having a tapered portion 37 terminating in the portion 38 in which the walls are parallel. If desired, a flat base may be extended outwardly from the periphery or sides of the portion 38 in order to give a more secure anchoring to the post when mounted in operative position. p

In the present invention, it is thus seen that I have provided a concrete post which may be used for the purposes indicated here- As shown in Fig. 6, two binding in, possessing the necessary strength to resist lateral strains and to carry the loads usually placed upon such posts; It is also apparent that the reenforcem ent is reduced to a minimum, and that the method of tying the reenforcing rods together is one that is practicable and permits of easily tying of the rods and offers the least resistance to the plastic material, when the same is being poured into the form. It is to be noted that the neck which joins the heads is traversed by reenforcing rods adj aeent its opposite sides and that the heads have traversing throughout their greater length reenforcing rods which serve to present great tensile strength to the neck and the heads and bind the reenforcing'rods in their proper positions.

While I have illustrated and described the preferred form of structure, I do not wish to limit myself to the precise form of structure shown but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A post formed from concrete or the like and having oppositely disposed VQb.

forming portions connected by a neck-forming portion; reenforcing rods projected longitudinally through said web-forming members, the number and location of said reenforcing rods in each of said web-formingmembers being duplicated at opposite sides of the medial line of said neck-forming portion; and wires projected through said neck-forming portion and bent at opposite ends around the ii'eenforcing rods in the opposite web-forming members, said wires being projected through said neck on the same side of the medial line of said neck as the reenforcing rods embraced thereby are positioned.

2. A post formed from concrete or the like and having oppositely disposed web-forming portions connected by a neck-forming portion; reenforcing rods projecting longitudinally through said wei'i-formii'ig memhers, the number and location of said reenforcing rods in each of said web-forming portions being duplicated at opposite sides of the medial line of said neck-forming portion: and a plurality of binding members projected through said neck-forming portion. each of said binding members being projected between the medial line and the outer edge thereof for connecting the re enforcing rods in op 'iosite webs on corresionding sides of the medial line of said neck, a plurality of said binding members being positioned on one side of said medial line, and a plurality being positioned on the opposite side of said medial line.

.3. A post formed from concrete or the enforcing rods in oppositewebs on correspending sides of the medial line of said 10 neck, a plurality of said binding members being positioned on one side of said medial line, and a plurality" being positioned on the opposite side of said medial line, each ofsaid binding members being angular-1y turned at opposite ends outwardly from said medial line and doubled upon themselves, adjacent their extreme ends.

In testimony whereof I have signed the foregoing specification.

KARL 'MI'lLLER; 

